: By staying away from any remaining human forces (they boarded an alien
: ship at the end), she would be guaranteeing that the MC wouldn't find out.

What alien ship are you referring to? Surely not the one that Cortana and MC escape from HALO on? Because that's a Longsword, one of the UNSC's starfighters.

: Of course, what really ticks me off is that if you kill off the two banshees
: following your ride home, before they shoot, your ride will still burst
: into flames and fall like a rock right before it gets to you.

Wow, I didn't know you could kill those jerks. I guess Foe Hammer had just taken too much damage by then, huh?